Determination of the diffusion coefficient of protons in Nafion thin films by ac-electrogravimetry

This letter deals with an adaptation of the ac-electrogravimetry technique to extract separately the dynamic properties of H(+) and water in Nafion nanometric thin films (average thickness of 400 nm). An original theoretical approach was developed to extract the representative parameters from ac-ele...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 29(2013), 45 vom: 12. Nov., Seite 13655-60
1. Verfasser: Sel, Ozlem (VerfasserIn)
Weitere Verfasser: To Thi Kim, L, Debiemme-Chouvy, Catherine, Gabrielli, Claude, Laberty-Robert, Christel, Perrot, Hubert
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a This letter deals with an adaptation of the ac-electrogravimetry technique to extract separately the dynamic properties of H(+) and water in Nafion nanometric thin films (average thickness of 400 nm). An original theoretical approach was developed to extract the representative parameters from ac-electrogravimetry data. The concentration change of the exchanged species and the diffusion coefficient of the protons in a Nafion nanometric thin film (D = 0.5 × 10(-6) cm(2) s(-1) at 0.3 V vs SCE) were estimated for the first time according to the applied potential. The conductivity value of Nafion thin films was calculated from the Nernst-Einstein equation using diffusion coefficients and concentration values extracted from ac-electrogravimetry data. The calculated conductivity results agree well with the experimental proton conductivity values of Nafion thin films 
650 4 |a Journal Article 
700 1 |a To Thi Kim, L  |e verfasserin  |4 aut 
700 1 |a Debiemme-Chouvy, Catherine  |e verfasserin  |4 aut 
700 1 |a Gabrielli, Claude  |e verfasserin  |4 aut 
700 1 |a Laberty-Robert, Christel  |e verfasserin  |4 aut 
700 1 |a Perrot, Hubert  |e verfasserin  |4 aut 
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